I'm 16 a guy and My heights 5'5 my weight is 130 pounds how much weight do I need to lose to get rid of my armpit-fat and moobs and my lower back fat?

It is more helpful. to work toward turning fat into muscle. Your weight sounds appropriate. If doc says your health is ok, some upper body exercise could be helpful. Try to focus more on being neat, clean, and treating others the way you would like to be treated. Peace and good health.