Scam without Security Answer?

this afternoob there was someone who wanted to scam me without my security anwer..
he said he want to buy my acc he just want my id and pw first to check..
but i dont gave it to him cuz i knew i wanted to scam.. but is here somebody who knows how he could scam me without my security answer or without e-mail?

Don't worry just check your email. The pass he changed it too should be there