You'll be fine. People over analyze proportions on this forum tbh. No one else will really notice anything. Your arms will be a little short (relative to your height), but nothing crazy.
You have two arms. Your final height (183cm) will be 7cm more than your wingspan (176cm). This basically just means your each of your hands will each be 3.5 cm higher than they would normally be. If you only do 7cm, then it means each hand will be 3 cm (so basically just an inch) higher than they might normally be.
