Males on an average grow in height upto 21 yr of age, after which bone maturity is reached. Diet and exercise do have an effect but mostly the height of a person is determined by the genetic constitution.
Given the height of your parents your height is well within the expected range but you may still have a year or two of growth left.
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Next Steps
Have a healthy diet rich in
calcium and proteins.
Do regular physical exercise.
Health Tips
consult for more information