The search results for "average DELF B2 scores" generally provide some helpful data, but they frequently lack official, transparent, or recent statistics. Most information comes from test prep sites, forums, or individual language schools rather than France Éducation international (the official DELF/DALF governing body).
You are above average. This indicates strong control of the language. You likely handle complex arguments well. Congratulations—this is a very solid result.
"The average DELF B2 score among our students at XYZ Language Center is 68.5/100, with speaking being the strongest skill (avg 18/25)."
This is useful but not generalizable.