Is this low blood pressure?

"Low" is semantic. "normal" blood pressure is an arbitrary thing--i.e. Lower cutoffs of 100 systolic, 60 diastolic were created b/c above these are where the vast majority of people fall. However, many healthy people, as well as some people with heart or liver disease who are perfectly stable, have BP in the 80-90s range. The main point is if it is a change from your personal baseline, and whether you have symptoms.