My DS started solids at 1 year. Breastmilk has more calories than almost all solid foods. Until 1 year of age babies should be getting 95% of their calories from breastmilk. I think her weight is perfectly fine but if you feel you need to increase anything, I would just nurse more.
Single Mommy to my 3 year old DS born all natural
. We are a Cosleeping
, Babywearing Non-Vaxing