command should still works :
show mac address-table [dynamic | static | secure] [vlan vlan] [interfaceinterface-id] [address mac-address]
here is normal proceedure :
1. First you need to knw the IP address of the PC
2. On the Layer 3 switch, you covert IP arp in to MAC - show ip arp x.x.x.x ( x.xx.x IP address)
3. take the MAC address and find in switch to tell what port connected.
make sense ?
this is normal Option - by default.
other way is make automate script to search for you (out of the box)