I believe that "normal" glucose levels varies to some degreee between indviduals, probably due to genetic factors. However there is a "reference" for Pre-meal plasma glucose in non-diabetics that ranges between 82-110.
Your fasting blood sugar
of 115 is a little high, however it lies within the range of "normal" fasting blood
What strikes me is that you feel drained shortly after eating(the drop from 129 to 89 within one hour) .