What Is The Normal Cholesterol Level For An Elderly Person?

I have heart disease. I have had multiple heart procedures, including bypass and angioplasty. But I ve been able to get my cholesterol down over the years from 356 in 1975 to 104 presently, with similar improvements in the other lipid levels. This has resulted in better heart health. But is my cholesterol level too low at 104? I m 72 years old.