Soldering Arduino Pro Mini's disaligned pins
That's indeed quite an problem. 

If you don't mind losing 2 analog pin, you could solder some jumper-wires between A4 and A2; and between A5 and A3. Then you could connect your I2C lines to pins A2 and A3.

But you have to be careful to never set pins A2 and A3 to OUTPUT in your software. If you want to be super-duper safe, you could cut the trace from the header pins going to the TQFP-chip. See the image below.