Your intervention at this point will make a huge difference to your daughter's health. You can only wait and see if she grows taller, but more importantly will be what you can't see in terms of bone and organ health, and this is where proper nutrition will make a big difference. This will also be reflected in her mental abilities which will also benefit. A good diet and good nutrition makes a big difference for children in terms of their clarity of thought and their ability to understand and retain information.