Could you have misread the result, or was it badly written or has the note writer mis-read? If it was meant to be 7.3% (seven point three) it's closer to borderline, depending on what you or your medics were aiming for. It's higher, however, than borderline diabetic.
If it is a genuine 73%, I think you might be dead, have you checked? If it's 73mmol/mol (which is the usual way results are given in the uk) this is high, but many have been higher and then dealt with it and come down to normal levels.
Sally