Puberty questions!!!!!!!!!!! please help?

I am 14 years old. I am a guy and i am currently 5 feet and 8 inches tall. i wanted to know if i will grow taller? i am already two years into puberty ..i have already had my growth spurt and i have already grown pubic hair. my voice is alot deeper and i am sometimes "grumpy" as my sibling call me. i also have a bit of a weight problem. i am 220 pounds and again im 5,8 ..i know well enough that im obese. about two weeks ago i changed my bad habits and unhealthy ways though. i used to eat 5 - 6 times a day and had little to no physical activities also i played on Xbox live all day. now i only eat 1 - 2 times a day ..go for a 2 mile run every morning and in the afternoon i do 100 sit up's and 50 push ups .. will there be extra skin after i lose 50 - 70 pounds before july 2012?