It looks like the point of the breast dart sits too high. It usually ends at the point of the breast.  

There's plenty of reference patterns available on line. If you want to flex your muscle in Italian here's a good one:

https://issuu.com/tallerbioarq/docs/la_tecnica_dei_modelli_uomo_-_donna.

It gives a lot of theory first. Patterns for 'corpini e camicie' start at page 139.

There's also a part 2 with patterns for Antonius.