Your husband's T level is well within the normal range it is very unlikely that his T level makes any difference when compared to some other level his PA might thing of as "normal". It is true that if your husband's PSA level is starting to creep up -- which is not yet indicated; one data point is not a trend -- then his doctors could probably stop the rise (at least for a while) by lowering his T level but for it to make any difference at all they would have to chemically castrate him. Small changes in T level -- moving it around within the "normal" range -- make no difference at all and there is some evidence that high-ish is better.
For a bit of background, you might read this article in European Urology: Goodbye Androgen Hypothesis, Hello Saturation Model
. Morgentaler (the author) is a bit of a maverick. He is going against the conventional wisdom of generations of doctors, but he has pretty much all
of the recent research on his side of the argument and the conventional wisdom is coming around.