1. first thing first: Exercise will not increase height as bones can't be exercised, so don't put your money in any of these programmes.
2. there isn't any medicine which can increase the height otherwise Sachin would have been much taller than Irfan.
3. height of parents?
4. any major past illness?
5. you can go with natural calcium supplements
by consulting an Ayurveda Physician there, and also for Surya Namaskar.