Maybe not great but for ninety maybe not horribly unusual. The top number is the pressure when your heart contracts or 'beats' and the bottom when it rests between beats. High on the bottom would be much worse. Still, 161 is hypertensive so you should mention it to your doc, esp if you are on BP meds already.
it's high for anyone. uncontrolled high blood pressure can have dire consequences that can cause debilitating lifestyle and even life threatening injuries and even death. This person should be evaluated by a doctor to see if high blood pressure medication is needed.