Adjusting of questions in form & connecting responses to another workbook to sync answers

If i needed to adjust the questions in my form how will the previous answers be affected? 

I need to rearrange some of the questions in my form (for vehicle maintenance) if i move the location of the answer will it affect any previous answers? 

I also need to sync the workbook that the form responses go to on share point to our vehicle maintenance excel spreadsheet saved on Dropbox to a historical sheet. How can I connect the forms so when new responses are submitted, they will auto populate a copy of the response to our Dropbox excel workbook on the correct worksheet?