need macro for auto updating columns

hi - i have never used macro's before and need to use one for my current spreadsheet - i have attached the sheet that needs the macro adding - basically i want the table to automatically update when the data changes in the column " position " so that if the number changes in that column it sorts into order - if someone could help me with the code needed i would be really grateful - you will also need to tell me step by step instructions on how to insert the code as i have never done this before - i am currently using excel 2011 on a mac - thank you in advance for any help received - very much appreciated

super 7.xlsx