How to Update XML tags value with new values in SQL Script

Question

This is my XML in one of the column in the XYZ Table, here i Need to update Amount tag with new value instead of 0.00 and then PolicyReference and AccountReference I need to update two diffrent values in these tags instead of Blank .

 

For example:- <PolicyReference>7657576567</PolicyReference>

<AccountReference>7657576875</AccountReference>

 

This is my XML document

<document>
<StatusCode>ACV</StatusCode>
<PaymentMethodDetail>
<EFT>
<AccountNumber>123456789</AccountNumber>
<AccountName>ABCDEFGHIJK</AccountName>
</EFT>
</PaymentMethodDetail>
<PaymentExtendedData>
<CHECK>
<Source>System</Source>
<SourceType>ACH</SourceType>
</CHECK>
</PaymentExtendedData>
<PostMarkDate />
<EntryUserId>1</EntryUserId>
<Amount>0.00</Amount>
<EntryDate />
<PolicyLineOfBusiness>LOL</PolicyLineOfBusiness>
</PolicyReference>
</AccountReference>
<AccountId>2034001793</AccountId>
</document>

Could you please let me now How do I achive this in SQL query