Are there any health food store teas I should avoid if some kidney damage from hypertension at 80?

Suggest all. The stuff in healthfood store has not been validated in an official way. If we see sometimes research fraud in medicine, we should expect lots more in non regulated industry like healthfood. No need to try non-formally tested stuff. You are 80 and have done well so far. Keep it this way. Control bp with low salt & meds if needed. Remember, studies show daily multivitamins not being good for us.
Tea and hypertension. Teas can contain mixed herbals that can generate higher BP - avoid teas that aim to lose weight by burning calories; avoid licorice teas; minimize ginseng teas; and be careful that you do not get dehydrated from caffeine.