if x is a match in this selection then display the info in the column next to it

I removed the Data Validation from PO Tracker column D (Customer Address) and insert the below formula

=INDEX(CONCATENATE('PO Settings'!$E$3:$E$500,", ",'PO Settings'!$F$3:$F$500,", ",'PO Settings'!$G$3:$G$500),MATCH($C14,'PO Settings'!$C$3:$C$500,0))

For C7:C10

=INDEX('PO Settings'!$D$3:$D$500,MATCH($C$6,'PO Settings'!$C$3:$C$500,0))
=INDEX('PO Settings'!$E$3:$E$500,MATCH($C$6,'PO Settings'!$C$3:$C$500,0))
=INDEX('PO Settings'!$F$3:$F$500,MATCH($C$6,'PO Settings'!$C$3:$C$500,0))
=INDEX('PO Settings'!$G$3:$G$500,MATCH($C$6,'PO Settings'!$C$3:$C$500,0))

This is an array formula so do not just press the ENTER key. Press CTRL + SHIFT + ENTER