Is it possible for a 14-15 year old grow up to 5'7 if he is 5'2-5'3?

hid disadvantages are having short parents and grandparents but one average height grandparent 5'9 and his advantages are eating healthy, exercise daily, drink milk and hope. I have seen many 14-15 are not growing anymore, but some says you will grow up to 21, it is a huge difference.