It isn't on the list of supported processors: https://www.asus.com/Motherboards/M4N68TM_LE_V2/HelpDesk_CPU/ Your motherboard is socket AM3 and the Athlon 5350 is socket AM1; therefore it won't fit.
It isn't on the list of supported processors: https://www.asus.com/Motherboards/M4N68TM_LE_V2/HelpDesk_CPU/ Your motherboard is socket AM3 and the Athlon 5350 is socket AM1; therefore it won't fit.