Age should have nothing to do with a person's blood pressure. It is our physical health that affects it. If you lie around eating chips, smoking
, no exercise and generally don't take any special care of yourself.....your blood pressure is going to go higher as you get older.
A person's genes can affect the blood pressure, even if they exercise, eat right and generally do the right thing.
The cardiologists I work with feel that everybody should maintain a blood pressure around 120/80. That tells me if you try to eat right, exercise, don't smoke and generally do your best to live a healthy lifestyle, then your blood pressure has little to do with your age and a lot to do with how you live. And of course, those who have the "bad" gene pool go to their docs and get medical treatment to keep the BP down. I hope this helps answer your question.