What is the normal blood pressure of a 15 yr old female, 105 pounds and 5ft 3?

Good question. For a 16 years-old girl who is 63 inches tall, the 90th percentile for blood pressure is 124/80 mmhg. So a normal BP would be less than or equal to this.
NORMAL BP. It usually range from 100 to 120 systolic with diastolic 60 to 80.