Charles Foltz lived in Newville, a small borough in Cumberland County of south-central Pennsylvania.

https://en.wikipedia.org/wiki/Newville,_Pennsylvania

In 1917, Charles had a photographic portrait made at the Hoover Studios.

Hoover Studios had operations in Newville and in Carlisle, but I believe that Charles lived in Newville.

Charles (“Charley”- on the face of the postcard) can be found in on-line genealogical databases.

Charles Harrison Foltz was born in 1899, in Cumberland County, Pennsylvania.

His father, Elmer Lewis Foltz, was 28 and his mother, Minnie Alice Smith, was 19.

Charles would have been 18 at the time the photograph was made.

The portrait may have been made in celebration of his high school graduation or of his marriage.

Charley married Effie Jane Mixell on 15 September 1917, in Newville, Pennsylvania.

The couple had one daughter, Minnie Jane Myers (1918–1994).

I can not find any data regarding Charley’s occupation.

Alas, Charles died in 1949 at the age of 50.

Effie died in 1977 at the age of 81.