Hi there, I think you should go on a diet to get rid of stubborn fat.

Your body fat percentage is normal, but the key to losing your belly is to eat "the right food"and do "the right core exercise" such as "Plank".

Hi there. Your height is set by your genes as well as other factors. Though many effects or factors that predict your height are out of your management, there are a couple of things you can do to grow to your desired height. 

Anyway you're still young,so do not worry about your height.