Preapproval letter amount

First time home buyer here and need some suggestions. Found a house listed at $325,000 and trying to offer $330,000 since the house already has started getting offers. I have a preapproval letter of $350,000 and I am wondering if should ask my lender to prepare the preapproval letter of the exact amount that I am going to offer i.e 330K? Does it make any difference if I submit the 350K preapproval letter? Will the 350K letter make the seller demand more? I do not want to over pay either way. Thanks in advance.