You kind of have to play hardball.
If your lender decides its not worth what you are paying, they can rescind your loan (though, without further info I don’t know if that is really in the cards).
Either way, that appraisal now becomes part of the minimum disclosures for the bank to give to any buyer.
Ergo, you will probably get it for the lower amount.
If you don’t end up paying 9 less, someone else will.
Some banks still try to play hardball on this (as this seller may).