Oh! Now I get it. I wasn't seeing that at all in my browser.
Okay, try this. At the bottom of the style.css file for your theme, add the following:
Then, in the text widget that has your phone number and business name, wrap the text in a div or span and add the class you created above:
Alameda County Real Estate Investments</div>
What you're doing is creating a separate CSS class that only affects the text widget, and not all the widgets in the header.
Note: You can name the class whatever you like as long as there are no spaces or special characters other than the hyphen or underscore. I just picked "header-widget-site-info" for the example. The main thing is to make sure the name you choose isn't used elsewhere in your CSS. I suggested you put it at the bottom of the file so it overrides any other alignment settings that apply to that area.