Junior Front End Web Developer
Good news, you are already a "Front-end Developer." Depending on the company, you might even be a "Senior Front-end Developer." So first of all, don't get hung up on wondering where the line falls between Junior and Senior, or even "front-end developer" and "web developer" because those lines don't exist.
Even if your current employment system considers you a Junior Front-end Developer, you are free to be marketing yourself as more than that, so long as you never misrepresent your abilities.
Those $85, 000 jobs are going to expect reliable, proven experience. The most important thing you can be doing, beyond actually developing the skills you already know to be associated with "front-end development, " is being able to demonstrate those skills to a potential employer. The easiest way is by creating a personal website that directly shows off your talents, and also features projects you've worked on. Maybe you can blog about specific development challenges you faced and overcame. I recommend looking into a more technical route like Octopress which should be more of a challenge, and will be another point in your favor to anyone considering you.
To reach the salary you are shooting for, you should be investigating remote job opportunities, since I assume relocation is not an option. Don't be afraid to shoot for jobs that seem out of reach, but be willing to accept that you are fairly early into your career and it may take some years and a few different jobs to get where you want to be.