Exporting data from GY-521 to to PLZ-DAQ

New guy getting into Arduino as a hobby
I have been trying to export some acceleration data from the GY521 to the excel spreadsheet with a little success I have played about with Krodal’s GY531 code and libraries and have gotten some data into the spreadsheet, the one thing I am having trouble with is defining the data that I want.
The original code seems to use the byte location to define the X acceleration value, for example, as a consequence the data does seems to come in to the spread sheet as one value
Attached is a copy of the code,

GY531 MOD PLX DAQ.txt (33 KB)