With one testis atrophied my testosterone level is 259 is that good or bad?

Four years ago I had surgery for a left inguenal hernia which unfortunately resulted in uncorrected internal post-op bleeding causing ischemia and susequent atrophy to the left testicle.  Until recently, I've never had my testosterone level checked against the reference range.  I am 83 years old and in very good health. I am told the normal reference range is 200 to 900, hence my question ... is 259 good or bad and is it dependent upon both testes functioning?  My PSA level averages 3.5 and DRE tests are always normal. I have BPH. I am sexually active but not as frequently as in the past. 

My doctor does not have an answer for me.