C172 models and panels design
If you are asking “When did the Cessna 172s adopt the modern 6-pack layout, the answer is 1968. You can verify this by looking at for sale pictures. All of the 1968 panels have the normal 6-pack layout while very few of the 1967 do. The revised layout in the 1967s is obviously not from the factory. They aren’t completely lined up like in your picture for a few more years. If you care to know when, browse through some for sale listings.

Cessna 172 - 1967



Cessna 172 - 1968



Also,I have a copy of the 1967 Owner’s manual and it shows the old layout like in the first picture.