Excel worksheet protected but can't use text to column function

HI

I have a worksheet that several people use that I need to protect. There are formulas and a pivot table. I have been able to lock what I need and am able to refresh the pivot table but I can not use the "text to column" function in the raw data as its greyed out. The area in question are not locked cells but the function is still unavailable. We need to be able to use the text to column function but I also need the sheet locked to protect the formulas.