Hi Rahul,
I guess you are from India [w.r.t name].
First you need to understand that marksheet copies and transcripts are totally different. You cannot directly send your marksheet originals or marksheet copies to WES. You should approach your university with your marksheets, provisional/ graduation certificate and apply for transcripts. The university inturn will issue transcripts in their official sealed cover. You should proceed with this to WES to get your degree evaluated.
Before that read the official ircc site fully, without which you really don't understand things.