The blood pressure if fine.
The wide pulse pressure referred to by the other poster could be due to several cardiac conditions from "hardening of the arteries" to aortic regurgitation
, but it is unlikely to be causing the giddiness. And at 89 years, it may not be appropriate to pursue the cause of the wide pulse pressure.
The giddiness could be dementia
. The prescibed medication suggests that to me. What does the patient's physician say?