BP is more or less a continuum and in a sense there is no 'normal' blood pressure (or at least what is 'normal' is constantly changing), merely lower blood pressures which confer correspondingly less risk of heart attacks, strokes and what-have-you. In non-diabetic hypertensive people, the treatment aim is a BP below 140/85, with 150/90 being acceptable. To achieve 140/85 can sometimes take a combination of three drugs in my experience.
Click on 'Resources' and then the Third working party guidelines at
www.bhsoc.org for more info. You'll find the summary at the beginning contains most of what you want to know. Sounds like your BP isn't too drastic though.
QDM