Find/Replace within String Text

[SOLVED]

Looking to find and replace part of a string text in each cell. See attached, but example as follows.

A few cells have text 88734-(number) and want to go through and replace all the "88734" with "88735" but keep the suffix number the same.

Figured out there was a selection box to match case in the find/replace options.

find 88743
replace 12345

See the attached file.

Please reply where it go wrong (column K)