You have reached an age where growth of ht stops. Still you can do exercises like swimming and cycling. As  far as my knowledge there is no medicines available to increase the ht at this age.

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The long bones of our body decides our height. So till these bones get ossified, we can increase a persons height. In case of females, increase rate of height decreases after menarch (when menses get started). Medicines, stretching -bending exercises,yoga,  lifestyle improvements will help in it.  There r some Panchakarma therapies also which can help. Consult ayurvedic physician for proper treatment.

Need more details like others family members height and her harmonal details etc. Still she can take good amount of proteins and calcium along with taadasan everyday. High jumps also help.

Height depends upon so many factors, important one is hereditary... See your family tree... Still try physical activity