My blood pressure is 136/86 is this normal or okay for a 17 year old girl weighing at 185 lbs?

This is a little: high, but it depends on when this was done and what activity or activities you had been doing right before. Also, anxiety can increase BP transiently, so if you're nervous at the doctor, that could account for the 136/86. Other things important to know is your height,rest of your exam, medical history (family and personal), so this is best discussed with your doctor who knows you.