June 30 (Reuters) - Shares of LegalZoom.com Inc opened 31% above their offer price on Wednesday, valuing the online legal services company at $7 billion in its Nasdaq debut. The stock opened at $36.75 per share, up from the initial public offering price of $28 per share. Reporting by Niket Nishant and Noor Zainab Hussain in Bengaluru; Editing by Vinay Dwivedi Our Standards: The Thomson Reuters Trust Principles.