I am 17 years old and my height is 169cm i want to increase my height 4 cm atleast how ?plz help i am short

Don't worry: Your height depends on several factors, including the heights of both your parents, your nutrition and the amount of sleep you get at night during your growing years. Try sleeping at least 10 hours a night. You may be growing still ,or not. Focus on your qualities and your goals in life. I'm 160 cm and am a respected doctor in the USA. It's what you are and what you do to help people that counts.