Your height is 5' 4", which is 162 cm.
Your weight is 59 kg.
Your BMI is 22.5 . which is not bad.
You are already 20 years old. So you have almost achieved the full potential as far as your height is concerned.
You can look a little taller by maintaining a good posture. You can improve a little by a good diet with Proteins,
Calcium and Vitamins.
You should consult an Orthopedic surgeon also.