An interesting topic... However, it is not a simple question to answer, because girls are not just looking at height or muscle for a guy. They look at many aspects of man including height, muscle/body shape, face, humor, capability/potential, job/income, or more, although each woman may have their preferences. Therefore, it is quite difficult to directly compare only between height and physique.
However, we also need to realize that tall guys are also working out!!! In fact, you may find that a lot of athletic guys are rather taller (perhaps > 178cm) than shorter (< 170 cm). Plus, there have been a number of studies showing taller guys tend to be more successful and have higher income probably because tall people are more attractive, more social, and more confident than short guys. Of course, there are always exceptions of short/average guys who are very attractive and successful. Again, we need to realize that most of men are not as good looking or humorous as famous actors or celebrities.
In conclusion, if we can achieve additional strong factor such as height, that may increase probability of being successful and attractive.