I think you guys are mostly right… not getting all your nutrition or a full 8 hours sleep is not likely going to affect the height of 1 person. My doctor had told me that most bodies have a way of compensating for deficiencies while they are growing from children to adulthood unless there are unusual or extreme circumstances. Unfortunately, mine was a little extreme because I went on a "soda diet" (drinking soda to feel full & eating as little solid foods to lose weight) for about 6 years in my adolescence and I got really really skinny. Worse, I slept only 4 hours a day by taking 2 hour naps as my way getting more study time for school. My body became accustomed to waking up automatically after 2 hours for many years even after I graduated college. Even with all that, I'm only going to say I might have lost 1-3 inches of growth since I stopped growing when I was on my soda diet with my sleep deprivation habits... or maybe I was destined to be shorter than my father and all my male relatives… who knows.
That being said, I think the foods you eat can affect people's growth over generations and it's not about nutrition either.
Over many generations, smaller Asians tend to eat far less calories and less red meat than their larger western counterparts with more vegetable & seafoods and even insects in their diet. Red meat was definitely not common even for the wealthy. I definitely think that it affected their evolutionary heights and evolution affects physical appearance down to your genes.
From my observations, westernized Asians eating a lot more American fast foods over a few generations are growing faster than those who live mostly on traditional diets because all my relatives who eat traditionally are smaller (but probably healthier) than those whose families have become westernized eating steak and burgers. It's quite noticeable at family gatherings when we have seating arrangements with tables serving traditional asian buffet and western buffet. Those sitting at tables eating noodles/rice/tofu with assorted chopped meat/seafood and using chopsticks are noticeably smaller than those accustomed to eating steak, burgers and potatoes/fries using forks and knives. It's almost comedic looking. I'm not talking about 1 generation but over several generations of accustomed food habits.