Nějaká řešení najdeš tady, ale nemám čas se v tom pitvat:
http://www.experts-exchange.com/Software/Office_Pr oductivity/Office_Suites/MS_Office/Excel/Q_2120798 1.html
http://www.experts-exchange.com/Software/Office_Pr oductivity/Office_Suites/MS_Office/Q_20640088.html
http://www.pcreview.co.uk/forums/thread-3723625.ph p
http://www.ozgrid.com/forum/showthread.php?t=18350 &page=1
http://www.eggheadcafe.com/software/aspnet/3388216 0/how-do-i-display-numbers-as-superscript-in-an-ex cel-graph.aspx