Hi Frankie,
Try these steps
1. In cell CF98, type this: =IF(CF$76<>"",REPT("X",COUNTIF($F98:$I98,CF$76)),"")
2. press Return. In the example you've supplied CF98 should still be blank, but the formula bar should show the text (including the '=' symbol) shown above.
3. Right Click on CF98 and select copy. The cell should be highlighted with a dashed line.
4. Now left click and hold on cell CF98 and drag this selection across to CX101 then release the left mouse button, a rectangle of cells should now be highlighted.
5. Right click anywhere within the highlighted rectangle and select paste.
6. You should have copied the formula above to all the cells highlighted and excell will have taken care of ensuring the cell references are updated.
Hope this helps