Growth is mainly genetically determined. Some things can adversely affect growth, such as poor nutrition or hormone imbalances, but stretching and exercise will not help you grow any more. You stop growing when the epiphyseal plates in your long bones fuse, preventing further elongation.
You seem to have a lot of questions lately related to growth, exercise, muscles, etc. Have you ever taken a proper biology course? If not, you should take one...many of your questions would be answered and with your current curiousity, you'd likely enjoy learning the material.