Determine whether the product moment correlation coefficient changes

#1
https://drive.google.com/open?id=0B-Qk99jFSxW6c2FOTXJsSHkzTjA

Can someone please help me with part (e) to determine whether the product moment correlation coefficient increases, decreases or remains the same. Here is what I think. Although the new Syy increases with the addition, we cannot determine whether the new mean y increases or decreases. So even though the new Sxx remains the same and the new Syy increases, we cannot determine the change of the product moment correlation coefficient as we cannot determine whether Sxy increases,decreases or remains the same. Can someone please tell where am I wrong?