Your mockup is achievable using the header builder.
The setup described by Paul is the correct setup. Right now, you have 1 bar with 3 containers. The first containing your logo. The second, your phone number and third, your menu.
You will need to add a new Bar and within the bar, add 2 containers. Then, move your logo to the left container and move the menu to the 2nd container. You need to apply a negative top margin to your logo next to make it overlap the 1st bar. It would be best that you watch the quick setup screencast below so you'll have an idea.
Here's another overlap logo tutorial:
To take full advantage of the header builder it's best to learn Flexbox. You can watch our tutorial at https://theme.co/apex/forum/t/using-flexbox/24851.
Hope that helps.