The skype client for linux is 32 bit. So to run it on a 64 bit Linux installation you have to install 32 bit libraries. In a quick aside, I gotta say: Skype devs, 64 bit tech has been around for years… what the hell is taking you gyum search , the following will get you there:
yum -y install libXScrnSaver.i586 libXss qt.i586 qt-x11.i586